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If the drive is not recognized, then reseat the drive once and then check the BIOS again. If the drive is still not recognized after reseating the drive, then contact Support

Reseat the drive.

Note: Although the hard drive can be upgraded, it is not designed to be removed and reinserted on a regular basis. Repeated and frequent removal, for purposes other than to upgrade for greater capacity or problem determination, can cause damage to the system. Please review the Hardware Maintenance Manual for your system for detailed instructions.
Shut down, remove the power cord, and remove the battery from the ThinkPad system before removing the drive.

If another similar system is available, then verify that the drive works in the other system. In the event that the hard drive does work in another system, the original ThinkPad system is probably at fault. Test the hard drive for errors in the working configuration to ensure proper operation. Then, contact Support.

Test the hard drive for errors.

For all Current ThinkPad systems including R, T, W, X, as well as Z and G Series, please download and run the Lenovo Diagnostics Software for Hard Drive Quick Test.

Please check the compatible system listing to confirm the diagnostic will work on the particular machine. If the machine is not listed, go to the next step.

The Utility requires access to Windows. If Windows cannot be accessed, please go to the next step.